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数学
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计算 (1)|+2 2/3|+|-9| (2)|-3/4|+|-1 7/8|
人气:115 ℃ 时间:2020-04-23 03:13:09
解答
(1)|+2 2/3|+|-9|
=2+2/3+9
=11+2/3
=11又3分之2;
(2)|-3/4|+|-1 7/8|
=3/4+1+7/8
=1+13/8
=2+5/8;
=2又8分之5;
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